Below are Find a Grave memorials for Christian and his first wife. According to an online tree Christian had no daughter named Mary. There was Peter Walker Batschelet also in that county, but also had no daughter Mary that I can see.
Sorry, not much help.
from Find a Grave: Christian E. Batschelet Birth: Sep. 27, 1845, Switzerland Death: Aug. 13, 1933 Spencer Clay County Iowa, USA
from Find a Grave, his wife: Maria Ann "Mary" Marolf Batschelet Birth: Nov. 17, 1854 Death: Feb. 11, 1884 Parents: Peter Samuel Marolf (1823 - 1864) Anna Barbara Marolf Marolf (1829 - 1916) Note: Died at age 29 of consumption